Catalysis by cobalt Schiff's base complexes in highly selective conversion of arylglyoxals to α-aryl-α-hydroxyacetic esters

K Maruyama, Y Murakami, K Yoda…

Index: Maruyama, K.; Murakami, Y.; Yoda, K.; Mashino, T.; Nishinaga, A. Journal of the Chemical Society, Chemical Communications, 1992 , # 21 p. 1617 - 1618

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Citation Number: 14

Abstract

In a previous communication, we reported that Co"(sa1en) [ H2salen = 1,6- bis- (2- h ydroxyphen yl) -2,5-diazahexa- 1,5 - diene] catalysed the oxygenation of phenylacetylene in alcohols such as methanol, ethanol or propan-2-01 exclusively to give acetophenone , and mandelic and phenylglyoxylic esters.1 The formation of mandelic esters was assumed to involve phenylglyoxal as an intermediate. The well known conversion of phenylglyoxal to mandelic acid is usually ...

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